Name : ________________
Date: _______
Biology 11 Unit 5 - : Review #4
UNIT # 5 :Animal Biology – Porifera - Annelida
(Learning Outcomes J7- J9)
L.O. J – 7 Characteristics of Roundworms.
ROUNDWORMS
___ 1. Give both names for the phylum that roundworms belong to?
___ 2. How do the majority of roundworms live? (free-living or parasitic)
___ 3. Describe what is meant by the following terms:
A) Acoelomate
B) Pseudocoelomate
C) True Coelomate
____4. What category of body cavity do round worms possess?
___ 5. What is meant by the term DIOECIOUS?
___ 6. What is the difference between a complete gut and an incomplete gut, and what
type of gut is found in phylum NEMATODA?
___ 7. What type of symmetry do both Annelids and Nematodes possess?
___ 8. Describe three advantages of having a coelom or even a coelom, compared to
being an "Acoelomate".
____9. Label each position on the diagram below
A) Anterior
B) Posterior
C) Ventral
D) Dorsal.
____10. List the most common type of nematode infection found in humans living in
Canada and the US, as well as most other parts of the world.
____11. Try to name each disease or the worm that is responsible for each disease
described below:
A) Fairly large roundworm (may grow up to a meter in length) which has larvae
transmitted through unfiltered water containing copepods. Mature worms will
migrate into tissue just under the skin and create an open sore in the skin to
produce a way to vent out fertilized eggs.
B) Relatively small round worms which are transmitted through mosquito bites.
These worms set up and congest the lymphatic vessels. These blockages cause
massive swellings (edema) of extremities.
C) These fairly large round worms are one of the most common human roundworm
infections found in tropical and subtropical areas of the world. The female may
grow up to 30 cm. They reach sexual maturity and reproduce in the human
intestine, often forming large boluses which cause gastrointestinal blockages.
D) These roundworms are passed from mosquito to pets, such as dogs. They tend to
block the circulatory system of the pet.
E) These roundworms are usually transmitted to humans by ingesting undercooked
pork.
F) A very small round worm transmitted to humans by tiny black flies, these
microworms then live under the skin for years. Millions of these microscopic
worms are produced in a single host. They migrate under skin and into the eyes
causing blindness.
12. Identify each round worm depicted below:
A)
C)
B)
D)